Middlings-mill



A. WOLF.

MIDDLINGS MILL. APPLICATION FlLED JULY 1, 1919.

4 SHEETS-SHEET I.

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A. WOLF.

MIDDLINGS MILL. APPLICATION FILEDJULY l, I919.

Patented June 22, 1920.

4 SHEETS-SHEET 2.

A. WOLF. MIDDLINGS MILL. APPLICATION FILED JULY l, 9 19.

Patented June 22, 1920.

4 SHEETS-SHEET 3- JQWMW/ A. WOLF.

MIDDLINGS MILL.

APPLICATION FILED IULY I, 1919.

4 SHEETS-SHEET 4.

Ewen Z I? Patented June 22, 1920.

UNITED STATES PATENT OFFICE.

AUGUSTUS WOLF, OF GHAMBERSBURG, PENNSYLVANIA.

MIDDLINGS-MILL.

proved form'of mill for the purpose of eX tracting from that form of bran known as middlings? all of the available flour contained therein. In the usual practice of milling, the middlings contain consider,-

able fiourlt-hat fails to, separate therefrom in' any of the sifting operations, andat the same time is too slight to be crushedby the rolls. V

Tosecure' this flour, I propose to employ mechanism designed to impart a squeezing pressure to the middlings; my improved means serving to force the middlings against a'surface in a thin stream under such' pressure as to insure 1 substantially complete crushing of the middlings and the flour accompanyingthe same to a fineness that will permitjof the substantiall" complete recovcry of the flour from the eed.

My invention alsoincludes special means for regulating the pressure upon thefioury middlings atthe point of emergence from the squeezing means,and means for. quickly releasing the pressure applying parts in order to relieve any 'straincaused by the pressure of foreign material that may have be comejamnie'd therein.

. A further object of my invention is to provide a mill in which the floury and fibrous matter of the middlings passed therethrough may be more quickly and satisfactorily separated andinsuch a manner that the flour produced from the reduced, middlings is'improved in color.

A further object of. my'invention is to provide means for additionally crushing the fine middlings at the squeezing point, and a still further object is toprovide means for securing endwise adjustment of thefeed screw to insure proper crushing or squeezing of the middlings at all times.

' These and other features of my invention are. more fully described hereinafter, reference being had to the accompanying drawn 's, 1n wh1ch: I j Tigure 1,1's a side 'QlQVEttlOIl of a mid- 's-Mil'ls,.of which the following v Specification of Letters Patent. Patented Jun 22, 1920. Application filed July 1, 1919. Serial No. 307,970.

dllngs mill embodying the .improvements forming the subject of my invention. F g. 2, is an end-elevationof the same. Fig. 3, is, a longitudinal section on the line III-III, Fig. 2.

F1g. 4, is a section on the line IVIV, F 1g. 3.

I Ifig. 5, is an end view of the plate against which themiddlings are squeezed, and

Flg. 6, is a sectional view on the line VIj-VI, Fig. 1. As illustrated in the accompanying drawings, my present structure may comprise a cyhndr calcasing 1, havinga' feed hopper or receiving throat 2, at one end, and a discharge outlet or throat 3, at the opposite end. 7 The throat 3 may communicate with a dell very chamber 4, whereby the crushed middl ngs 'may be delivered to reels or sieves, and the shell or casing providing the chamber 1 may also serve as a supporting base for th'e'structure.

Disposed withinthe casing 1 is a screw having ja' body 5 of substantiallythe same diameten throughout and tapering at the forward end as at 6, and having a pair of threads I which may have portions 7 differing slightly in diameter from portions 7 of the same; the part1 of'the chamber of the casing directly beneaththe feed hopper 2, being slightly smaller in diameter than the greater portion of thechamber formed by such casing; a construction facilitating the feeding of the middlings to the squeezing point. lVhile I haveshown the threads of the screw as double, it will be understood that triple 'or any other convenient number of threads may be employed, without departing from 'the scope of my invention.

The end of the cylindrical casing 1 through which the middlings are forced by the screw is preferably cut off squarely at right angles to its axis as indicated at 8, and abuts the beveled edge portion 10 of a plate llsituated outside and yieldingly held in contact with said end; such plate being dis posed in the throat chamber 3 at the front end of the casing through which the recov ered flour drops, and from which it may pass to sieves, or any suitable form of separator. The inner surface of the plate 11 is provided with angularly disposed teeth or projections 12 inwardly of its beveled edge, whose duty and function it is to effect a crushing action upon the middlings fed between the same and the'end of the screw and its threads. For the purpose of yieldingly holding suchiplate 11 against the end 8 of the casing, elongated bolts 15 are provided, which are connected to lugs 16pm.- jecting outwardly from said plate; being held thereto by nuts 17, and said bolts BX-f tend rearwardly for operative c nnection with a collar 18 encircling the casing." The ends of said bolts are provided with thumb nuts 19, having springs 20 between'the same and the collar 18, so that a yielding connec tion is p'rjcwided, permitting releasej'of the parts should any foreign matter accompany theimiddlings andbefcarightat the point where thesqueezing operation occurs between the end of the cyllnder or the'screw and the plate 11 against which theinidc'llings are crushed or squeezed. 1 The'collar 18 is provided with cam faces 21 against which the springs 20 engage;

suchlsprings occupying the highest position:

withrespect I to said cams 'whenthe structure 2 is intheoperative position, and; washers maybe disposed at the en'dslof the springs: Should any. foreign substance be present in themiddlingsfand' be brought by the screw, t0 the point of' ext rusion andbatchjthere, I the platc'ill, 1 1i be'quicklyrelieved byim partingrotative movement} to the" collar' 18 by'a handle'22, which will cause'ltheflcams to ridebeneath the springs, thereby releasing the ';tension of [the same fandfreleasing" I, the pressure appl'ied'to the plate 11,150 as i Pressurelis applied to'the plate 11 through to V relieve any material fc'auglit thereby, or

permit removal of thesameJ.

the springs '20.]0n' the: bolts 15., and a nut 23 carried by the casing and contacting with V the ring or'collar}18, is employed-tomcrease or decrease this pressure; the casing being threaded at 2 1 for movement of the nut thereon. l The nut -may" be provided with lugs '25 wherebyit may be readily turned,

andupon turning said nut, tension ofthe springs canbe increased orv decreased, there-,

by increasing; or decreasing the pressure holding the plate 11 against the end of the if cylinder, and regulating the amount of, pres sure applied to the material extrudedbetween the end of such cylinder and ,said plate. t .t The screw is preferably mounted 'i-n. sui.t-"

, able bearings 26 and 27 at the ends of the machine, which may be of any suitable type desired. Between the rear end of-the screw and the end 28 of the casing, which end 28 may be in, the form of-a cap member. threada notch or slot 34 in the arm 32 of this member so as to -maintain the -latter in proper relative position with respect to the screw,

:while ii' sc'rews 35, with lock nuts 36, are in engagement with the arms 31 and serve to adjust the member 30' against therearaend of the feed screw'whereby its'forward'e'n'd may beheld 'in contact with the plate 11;

The body 5 of the screwmay beheld to the shaftr 37 by a set screw SEjan'd theshaft-is preferably provided with; an elongated seat 38 permitting adjustment ,of said screw on theshaft to take upany'wear at'the en'dtadjacent the plate ."111; being maintained in t such" adj usted' position" 'the fplateBQ' aHd' the meansbacking} or supporting the same YThGQS tIfLI CtUfG maybe drivenfby providing the Shaft with fa pulley 4C0, "whereby" power mayfbe applied thereto, or it i can be "driven by hand; 1 Access to the ,outletthroat '3 may beprovided by a door-A51, and access 'tofthe chamber 4 maybe provided byla door42. The ends of'a'pluralityiofgthe bolts 15 may 1 be steadied by passing the same casing of the feedlropper ij A --tlnrougl1 lugs orz'bosses"15Pcariiedby the I claim!" "1 The'combination of a casing, a screw operating therein, means for? drivfmg the screw, and a movable plate forming "a 010- surefor one end of the casinggsaidplate having a smooth wall; with which" the end of the cylinder engagesan'dbetw'een'which parts material within the cylinder .may extruded upon turning the screw} and V a toothed or serrated surface against which the material may be crushed by the end of the screw,

1QQThecombination'of a' casing, a" screw operating therein, "means for driving the screw, a movable plate forming a closure for one end of thecasing; said plate having a smooth wall with which the end of the cylinder engages and between which parts material within the cylinder maybe extruded upon turning the screw and a toothed or serrated surface against which the' material may be crushed by the end'of the screw, and means for yieldingly' supporting said plate. t V j 3. The combination'of a cylindrical casing having a smooth inner surface, a screw operating therein, means for driving the screw, a movable plate forming a closure for one end of the casing; said closure plate having a smooth wall engaging the end of the cylinder betweenwhich parts material within the cylinder. may be extruded upon turning the screw and aftoothed or serrated surface against which the material may be i crushed by the end of the-screw, and means 4. The combination of a cylindrical casing having a smooth inner surface, a screw operating therein, means for driving the screw, a movable plate forming a closure for one end of the casing; said closure plate having a smooth wall engaging the end of the cylinder between which parts material within the cylinder may be extruded upon turning the screw and a toothed or serrated surface against which the material may be crushed by the end of the screw, means for yieldingly holding said plate to the end of the cylinder, and means for adjusting said screw endwise to maintain it in substantial contact with the plate.

5. The combination of a cylindrical casing having a smooth inner surface, a screw operating therein, means for driving the screw, a movable plate forming a closure for one end of the casing; said closure plate having a smooth annular beveled edge engaging the end of the cylinder between which parts material within the cylinder may be extruded upon turning the screw and a toothed or serrated surface against which the material may be crushed by the end of the screw, a plate at the rear end of said screw, and means for moving said plate to keep the screw in operative contact with the closure plate at the end of the casing.

6. The combination of a cylindrical casing having a smooth inner surface, a screw operating therein, means for driving the screw, a movable plate forming a closure for one end of the casing; said closure plate having a smooth annular beveled wall engaging the end of the cylinder between which parts material within the cylinder may be extruded upon turning the screw and a toothed or serrated surface against which the material'may be crushed by the end of the screw, a plate at the rear end of said screw, means for moving said plate to keep the screw in operative contact with the closure plate at the end of the casing, and adjustable yielding means for holding said closure plate against the end of the cylinder.

7. The combination of a cylindrical casing, a plate having a beveled edge yieldingly held against the end of said casing, a screw for moving granular material against said plate whereby it may be extruded in an annular stream, a series of bolts supporting said plate in position, springs on said bolts for applying tension to said plate, a cam-carrying sleeve surrounding the casing through which said bolts pass; said springs being disposed between said cam sleeve and thumb-nuts on the ends of the bolts, a nut for increasing or decreasing said tension; said nut being threaded on the cylinder and in contact with the sleeve, and cams on said sleeve for permitting longitudinal movement of said bolts to relieve the tension of said springs when said cam sleeve is turned.

8. The combination of a cylindrical casing, a plate having a beveled edge yieldingly held against the end of said casing, a screw for moving granular material against said plate whereby it may be extruded from the casing in an annular stream, a series of bolts supporting said plate in position, a cam-carrying sleeve through which the bolts pass, springs on said bolts and interposed between said sleeve and thumb-nuts for applying tension to said plate, a nut for increasing or decreasing said tension; said nut being threaded on the casing in contact with said sleeve and being disposed between the sleeve and the plate, and cams on said sleeve permitting longitudinal movement of said bolts to relieve the tension of said springs when said cam sleeve is turned.

9. The combination of a casing, a screw operating therein, means for driving the screw, and a movable plate forming a closure for one end of the casing; said plate having a toothed or serrated surface against which the material may be crushed by the end of the screw and an annular smooth surface surrounding said serrated surface adapted to discharge the crushed material.

10. The combination of a casing, a screw operating therein, means for driving the screw, a movable plate forming a closure for one end of the casing; said plate having a toothed or serrated surface against which the material may be crushed by the end of the screw and an annular smooth surface surrounding said serrated surface adapted to discharge the crushed material, and means for yieldingly supporting said plate.

11. The combination of a casing, a screw operating therein having a plurality of threads; said threads having one diameter at one end of the screw and another diameter at the opposite end thereof and the casing being of such a size as to accommodate the different sized portions of said screw threads, and a movable plate forming a closure for one end of the casing; said plate having a toothed or serrated surface against which the material may be crushed by the end of the screw and another surface in contact with the end of the casing serving to additionally crush the material and between which and the plate such material is extruded.

' AUGUSTUS WOLF. 

